<template>
    <div class="app-container">
        讲师添加
        <el-form label-width="120px">
            <el-form-item label="讲师名称">
                <el-input v-model="teacher.name"/>
            </el-form-item>
            <el-form-item label="讲师排序">
                <el-input-number v-model="teacher.sort" controls-position="right"
                min="0"/>
            </el-form-item>
            <el-form-item label="讲师头衔">
                <el-select v-model="teacher.level" clearable placeholder="请选择">
                    <!--
                    数据类型一定要和取出的json中的一致，否则没法回填
                    因此，这里value使用动态绑定的值，保证其数据类型是number
                    -->
                    <el-option :value="1" label="高级讲师"/>
                    <el-option :value="2" label="首席讲师"/>
                </el-select>
            </el-form-item>
            <el-form-item label="讲师资历">
                <el-input v-model="teacher.career"/>
            </el-form-item>
            <el-form-item label="讲师简介">
                <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
            </el-form-item>
            <!-- 讲师头像：TODO -->
            <!-- 讲师头像 -->
            <el-form-item label="讲师头像">
                <!-- 头衔缩略图 -->
                <pan-thumb :image="teacher.avatar"/>
                <!-- 文件上传按钮 -->
                <el-button type="primary" icon="el-icon-upload"
                @click="imagecropperShow=true">更换头像
                </el-button>
                <!--
                v-show：是否显示上传组件
                :key：类似于id，如果一个页面多个图片上传控件，可以做区分
                :url：后台上传的url地址
                @close：关闭上传组件
                @crop-upload-success：上传成功后的回调 -->
                <image-cropper
                v-show="imagecropperShow"
                :width="300"
                :height="300"
                :key="imagecropperKey"
                :url="BASE_API+'/eduoss/fileoss'"
                field="file"
                @close="close"
                @crop-upload-success="cropSuccess"/>
            </el-form-item>
            <el-form-item>
                <el-button :disabled="saveBtnDisabled" type="primary"
                @click="saveOrUpdate">保存</el-button>
            </el-form-item>
        </el-form>
    </div>
</template>
<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
    components: { ImageCropper, PanThumb },
    data() {
        return {
            teacher:{
                name:'',
                sort:0,
                level:1,
                career:'',
                intro:'',
                avatar:''
            },
            imagecropperShow:false, //上传弹框组件是否显示
            imagecropperKey:0,//唯一标识
            BASE_API:process.env.BASE_API,//获取dev.env.js里面地址
            saveBtnDisabled:false //保存按钮是否禁用
        }
    },
    created() {
        this.init()
    },
    watch: {
        $route(to,from){ //路由变化方式，路由发生变化，方法就会执行
            this.init()
        }
    },
    methods:{
        close(){//关闭上传弹框的方法
            this.imagecropperShow=false
            this.imagecropperKey = this.imagecropperKey+1
        },
        //上传成功方法
        cropSuccess(data){
            this.teacher.avatar = data.url
            this.imagecropperKey = this.imagecropperKey+1
        },
        init(){
            //判断路径是否有id，有id根据id查询数据
            if(this.$route.params && this.$route.params.id){
                const id=this.$route.params.id
                this.getInfo(id)
            }else{
                this.teacher = {}//修复先点修改，再点添加，表单数据未清空的bug
            }
        },
        //根据id获取讲师
        getInfo(id) {
            teacherApi.getTeacherInfo(id)
                .then(response => {
                    this.teacher = response.data.teacher
                })
        },
        saveOrUpdate() {//保存或修改方法
            //判断是修改还是添加
            if(this.teacher.id){
                this.updateTeacher()
            }else{
                this.saveTeacher()
            }
        },
        saveTeacher() {//保存讲师
            teacherApi.addTeacher(this.teacher)
                .then(response => {//添加成功
                    // 提示信息
                    this.$message({
                        type: 'success',
                        message: '添加成功!'
                    });
                    //回到列表页面 路由跳转
                    this.$router.push({path:'/teacher/table'})
                })
        },
        updateTeacher(){//修改讲师
            teacherApi.updateTeacher(this.teacher)
                .then(response => {
                    // 提示信息
                    this.$message({
                        type: 'success',
                        message: '修改成功!'
                    });
                    //回到列表页面 路由跳转
                    this.$router.push({path:'/teacher/table'})
                })
        }
    }
}
</script>